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![[Figure 2]](rr5241fig2mag.jpg)
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Figure 2
The region around the 2Fe–2S cluster for closed and open chains. In chain E (salmon) in the crystal, the lid helix from chain E covers the iron–sulfur cluster. In chain C (magenta) the lid helix is flipped out in the open conformation, but the cluster is still capped by the lid helix from chain D. Weighted 2Fo − Fc density was calculated from the 1.65 Å resolution data set and contoured at 0.9σ; selected residues are labelled. |
![[Figure 2]](rr5241fig2.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
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